1.

5. 4.0 gm af NaCH, dissolved in 500 mi of solution, calculate molarity of thesoiution.

Answer»

Molarity = Number of moles / Amount of solution ( In litres )

NaOH molar mass = 23 + 16 + 1 = 40 g

=> Number of moles in 4 g = 4 g / 40 g = 0.1 mole

Amount of water = 0.5 litres

Molarity = 0.1 Mole / 0.5 Litres

=> Molarity = 0.2 M


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